pH值对大豆分离蛋白／壳聚糖复合材料性能的影响  

Effect of pH Values on Soybean Isolate Protein/Chitosan Composite Material Properties

作　　者：张超[1] 郭晓飞[1] 李武[1] 马越[1] 赵晓燕[1] 

机构地区：[1]北京市农林科学院蔬菜研究中心农业部华北地区园艺作物生物学与种质创制重点实验室农业部都市农业北方重点实验室,北京100097

出　　处：《中国粮油学报》2013年第10期21-25,共5页Journal of the Chinese Cereals and Oils Association

基　　金：北京市优秀人才(2010D002020000012)

摘　　要：pH值会影响复合材料分子间电离常数和分子间相互作用力,研究pH值对大豆分离蛋白/壳聚糖复合材料性能的影响,以期拓宽其应用领域。系统评价pH值对复合包装材料的力学性能、光学性能和阻隔性能的影响。研究表明降低复合材料溶液的pH值将提高大豆分离蛋白/壳聚糖复合材料的抗拉强度,降低其断裂伸展率、水蒸气透过率和氧气透过率,对其宏观色泽没有显著影响;流变学分析表明,在pH值降低时,复合材料溶液体系更加稳定,对外力的抵抗能力越强;FT-IR分析表明维持包装材料主要作用力为氢键和静电作用。The pH value can affect the ionization constant and molecular interaction in the composite packages. The effect of pH value on the mechanical property, optical property, and barrier property of the soybean - protein - isolate -chitosan composite package were studied to expand its application area. Fourier transform infrared spectros copy was adopted to analyze the structure of composite packages. The tensile strength rose when the pH value of the composite packages decreased, while their oxygen permeability, water vapor permeability and break elongation de creased. Rheology analysis showed the matrix became further more stable when the pH value decreased. The color of the composite packages had no significant difference. The result shows that hydrogen bond and electrostatic interac-tion are the primary force to improve the property of composite packages.

关 键 词：包装材料 大豆分离蛋白 壳聚糖 PH值 红外光谱 

分 类 号：TS201[轻工技术与工程—食品科学]